THESAURUS
slow up
afterthought, arrest, backpedal, backwater, bind, block, blockage, brake, bureaucratic delay, check, clip the wings, curb, decelerate, deceleration, delay, delayage, delayed reaction, detain, detention, double take, drag, dragging, draw rein, ease off, ease up, ease-off, ease-up, flagging, halt, hang-up, hindrance, hold back, hold in check, hold up, holdup, impede, interim, jam, keep back, lag, lagging, let down, let up, letdown, letup, logjam, lose ground, lose momentum, lose speed, minus acceleration, moderate, moratorium, obstruct, obstruction, paperasserie, pause, red tape, red-tapeism, red-tapery, reef, rein in, relax, reprieve, respite, retard, retardance, retardation, retardment, set back, setback, slack, slack off, slack up, slack-up, slacken, slackening, slow, slow down, slowdown, slowing, slowing down, slowness, slowup, stay, stay of execution, stop, stoppage, suspension, take in sail, throttle down, tie-up, time lag, wait